Side bearing for car trucks



Feb. 9 1925, Lfizims A. QMRESTNSN v SIDE BEARING FOR CAR TRUCKS Filed Dec. 13, 1924 i f l A I/////// /Vi Patented Feb. 9, i926.

Unirse STATES ANDREW CHRISTIAN-SON, GF'BUTLEP, PENNSYLVANA SIDE BEARING FCP CAR'. TRUCKS.

Application filed December 13, leze. serial No. 7155,*752.v

it. known Vthat I, iiNDnniv Crimsrmw son,Y citizen ot the United States, and a resident of Butler, in` thecounty of Butler Vand State ot Pennsylvania, have invented a new and useful4 improvement .in Side Bearings for Car Trucks; and 1 do hereby declare the following to be af full, clear, and exact. description thereof; n

My invention relatesto side bearings 'for 'jear trucks', and particularly to anti-fliri'ction bearings' especially adapted for mounting betiveen opposing surfaces oft truck bolsters and bodybol'st-ers, at the ends thereof.

One object oi my invention is to provide an improved form of bearing wherein movement of the anti-friction members is so controlled that they are at all times in proper loatl-receiving` position.

Another object oit my invention is to provide means whereby the distance through which the anti-friction member rolls in service is controlled with delinite relation to the relative horizontal movements oit the body and truck holsters.

Still another object ot my invention is to 'simplify and improve generally the struc-v ture and operation of bearings of the character referred to.

` -While the invention is herein shown and described as applied to the holsters of railfivay ears, it will be apparent that its use is not limited to railivay cars.

yOne of the forms which my invention may tal'e is shovfn in the accompanying dravving lwherein Fig. 1 is a view, partially in elevation and partially in section, of a bean ing' struct-ure embodying` my invention; Fig. 2 is partial plan and partial sectional vieiv of the device ot 1, and Fig. 3 is a. sectional view taken on the line 3 3 ot Fig. 2.

My structure is shoivn as applied between a truck bolster e and a body bolster 5, only sutticient of each of the holsters being shown to explain the invention. Upon the bolster @l rests a bottom bearing plate (5 partially encased Within a. housing 7 that is bolted at S to the bolster el. The plate 6 and the housing` 'l' are ot `arcuate form, preferably concentric to the center pin (not shown) ot the car. A roller E) ot' tapered form, so that it will tend-to follow the curvature of the plate 6, is supported by said plate and is provided with an annular rib 1() that rolls Within 1a groove o'rigned in the plate (l, This rib serves to assist in maintaining the roller 9 in proper position longitudinally of itsl axis upon the plate 6.

An upper housing member 11 is bolted to the body bolster 5 and serves to partiallyenclose an upper bearing' plate 12 that rests upon the roller t). 'lfheupper plate 12 is held in constant engagement with the roller 9 by means oit" springs 13 so thatthe roller cannotY at any time roll idly Jfrom one end to the other of the housing' 7 that partially encloses the same. This is an important feature ot' my invention.

In order to prevent the upper plate 12 from falling out of the housing 11,1 provide said housing with lugs 14; that extend downwardly and are perforated at their loiver ends to receive a bolt or pin 1F. The plate 12 is provided with an overhanging` or undercut portion 16 that is engaged by the pins 15 under conditions Where the roller 9.110 longer servesas a support for said plate. lt Will be understood, however, that the plate 12 has such range of movement vithin its housing); 11 as to permit it to normally mov-e vertically .such distance that it is constantly maintained in engagement With the roller 9.

The arcuate form of the hearing; plates and the tapered form of the roller permits movement of the roller With a minimum amount of friction when the truck has sivivelingmovement around the center pin, and the provision of the springs 13 or equivalent yielding` elements insures that the roller will follow the svviveling movements ot the truck with respect to the car body, and thus be at all times in proper load-receiving` position. Furthermore, by reason of the tact that the'movement ot the roller 9 is controlled by constant engage ment thereof with the plates 6 and 12, its distance of travel in any instance is only one-half the distance of relative horizontal movement as between the plates 6 and 12, so that the roller will never be carried too i'ar from the transverse center line of the plates G and 12, but will always be close enough to such center line ol the truck bolster to transmit thrusts to the bolster at the points Where such bolster is strongest, namely, points adjacent to the mid-portion thereof. i

1t will be apparent that more than one antiftraton member or roller be ployed if desired and that various changes in detail and general arrangement may be made Without' departing from the spirit and scope of the invention as defined in the aC- eon'ipanying claims.

I claim as my invention z" l. Bea ingr struct-ure comprising a bottom plate, a roller mounted on said plate, an upper bearing plate above the roller vand normally supported thereby, a housing partially enclosing` Vsaid upper plate, releasable means `for limiting the downward movement of said upper' plate with respect to said housing when out of engagement with said roller, and means for biasing the upperV plate toward its lower extremity of movement.

Bearing structure comprisingl a bearing plate, a roller supported on said plate, an upper bearing plate above the roller, a

housing partially surrounding said upper plate, said housing being provided with longitudinal recesses, and projections on said upperplate extending loosely into said recesses whereby the vertical movements of said Yupper plate are limited.

3. Bearing structure comprising a bearing plate, aroller supported on said plate, an upper bearing plate above the roller, a housing partially surrounding said upper plate, said housing being provided with longitudinal recesses, projections on said ripper plate extending loosely into said reeesses whereby the vertical movements of said upper plate are limited,` and compression springs :interposed between the upper side of said top plate and housine.

In testimony whereof I, thesaid ANDREW CHRIsTiANsoN, have hereunto set my hand.

ANDREW GHRISTIANSON. 

